Of course it's potentially dangerous but just know, NEVER try to move a Basset who reacts like this! BRIBE. This breed is a Pack breed and much as mine wouldn't react like this (they know better!) if you get one, more often a male, who does, you don't push it. He will regard things, and places as 'his' as he would have had to in a pack situation. And YOU have become is pack, so be aware.Seriously. This is a new issue and not one I'm ok with.
I've noticed Max doing this with the kids, but I figured it was that they were picking him up too much and he just wanted them to stop. But the snappiness is getting worse.
Today he fell asleep in my room, and since he's not allowed in here (husband wants a dog free zone and I don't blame him), I woke him up gently and tried to get him to come. When he didn't, I tried moving him and he growled and snapped. I figured maybe he was still in a sleep stupor, so I waited a couple of seconds and tried again and he did it again. It was three times before I could get him to just get up and follow and then put him in his den.
I know he doesn't like to be picked up unless it's his idea, but he's never been like that with me. Plus, I don't think we should have to never touch him when we want him to move. This is our house, and while we try our best to be considerate, I don't tolerate that kind of behavior from kids, and I'm not going to from a dog.
I am thankful he's never actually landed a hard bite. When I'm not startled by his snap, I try to put my hand in the way and his mouth is always soft. For this I generally say "Max!" And clap my hands loud. Then he goes to his den. Is this a dangerous behavior?
Instead of picking up (if you still can!), pulling or pushing, you AVOID/PREVENT the situations that might result in this first, and you TRADE/BRIBE - in this situation, make what's on the ground off the bed WAY BETTER. No more picking up - have a slip lead which you can drop over his head if 'force' is necessary.
With Bassets, you totally avoid 'confrontations'. Again with the applied psychology - make what you want, his 'idea'.
Just to add I had this situation, just once, with our first Basset who, due to my ignorance, managed to get on top of a crate I had our bitch, in season, in. The crate wasn't the strongest, and apart from needing him off there, I feared it was going to collapse with her in it. I reached to pull him off and he bit me. Phoned hubby who came back from work immediately (he was able to in the job he had at the time) and took him off to kennels where he spent the rest of the time she was in season.